The aim of the study was to determine the influence of foliar and soil magnesium fertilisation at two levels of nitrogen fertilisation, 74 and 114 kg N ha-1, on basic quality parame-ters of winter wheat yield. Four magnesium fertilisation objects were used: 1. the control without magnesium application, 2. foliar-applied 5% MgSO47 H2O + Wuxal top N, 3. foliar-applied 5% MgSO4 7 H 2O, 4. soil-applied MgSO47 H2O. The studies demonstrated a favourable effect not only of nitrogen, but also magnesium, on the major part of the analysed quality traits. From par-ticular magnesium fertilisation objects, the best effects were achieved by the soil application of magnesium, weaker effects after foliar application, in particular in the measures combined with foliar fertiliser Wuxal top N.